Measuring instrument



Aug. 10, 1943. w. L. JOHNSON 2,326,363

' MEASURING INSTRUMENT I Filed April 13, 1942 |uru WI, Jfakrzdwn IN V EN TOR.

Patented Aug. 10, 1943 MEASURING INSTRUMENT Walter L. Johnson, Bay City, Mich. Application April 13, 1942, Serial No. 438,849

1 Claim. (01. 33 -1c2) I This invention aims to provide a novel means for measuring'vertical or horizontal distances, novel means being provided for ,mounting and moving a rider by which a reading canbe taken.

A mechanic who abides by what is claimed may make changes in the precise structure. 7

shown, Without departing from the invention.

In the drawing:

Fig. lshows in side elevation, an instrument constructed in accordance with the invention, parts being sectioned away;

Fig. 2 is an edge elevation;

Fig. 3 is a section on the line 33 of Fig. 1; Fig. 4 is airagmental side elevation showing parts-that dojnot appear in Fig. 1; I

Fig. 5 is a section on the line 55 of Fig. 1;

Fig. 6 is a section on the line 66 of Fig.1.

In carrying out the invention, there is provided a body I, made of any desired material, and in the form of an isosceles right triangle, including a base 2, an upright 3, and an inclined upper member 4. A longitudinal recess 5 is formed in the upper member 4, and there are bores B in the endsof the uppervmember, there, being lugs I between the bores and the ends of the recess 5. In its upper edge,' the member 4 .A rider I8 is mounted for reciprocation on the upper, inclined edge of the body I and has a reduced foot l9 slidablein the groove8 and extended downwardly into the recess 5, the foot having side ribs vZIlreceived inthe under-cut portions of the groove 8. The micrometerscrew I II is threaded through the foot I9 of the rider I8. 'A set screw 2| is threaded into the rider I8 and is adapted to bear against the b 1 to hold the rider in any. position to which it may have been adjusted,- longitudinally of the member 4.

The rider I8 is supplied at one end with an elongated finger is provided, and has at one end a screw'26 shaped to .be threaded into the bore 24 or intothe bore 23L The upper edge of themember 4 is supplied with a scale .21, of any has an under-cut guide groove 8, extended the full length of said member, and opening-downof the micrometer screw It. Kerfed nuts IZ'are threaded on the adjusting screws II and engage the lugs I, to hold the screws I l against rotation.

A micrometer disk I4 is'held by a setscrew IE on the micrometer screw IE] and is located in the opening. 9. The micrometer disk I4 extends outwardly beyond the sides of the body I, to

promote a ready rotation of the disk. The micrometer disk I4 hascircumferential graduations I6 of any desired kind. On one side, the member 4 has an index I1, adapted to cooperate desired sort. The instrument is adapted to be.

used in measuring either. horizontal or vertical distances.

a horizontal reading;

1 reading is taken on the scale 21 and on the gradwith the graduations I6 of the micrometer disk nations lfi of the micrometer disk- I 4. Ifa vertical distanceis to be measured, between the lower edge of the base 2 and-the upper end ofthe finger 25, then the screw 26 of the finger is mounted in the bore 24: but if a horizontal distance is to be measured, for-instancebetween the outer edge of the upright. 3. and the finger I 25, then the screw 26 of the finger is mounted in thebore 23;

The instrument may be manipulated in' many ways, 'to facilitate the work of a die maker or machinist or any person having use for a device of the class described.

Having thus described the invention, what is claimed is:

A measuring instrument comprising a' bodyin 3 the form of an isosceles right triangle, the'bodyj 5 having a transverse opening and a' longitudinal Since the hypotenuse member .4 longer than the altitude part 3..or the' base 2, the scale 21 can be more'finely graduated, and still be readable, than would be the case if it weref on either of the'parts 2 or 3.' The micrometer disk I4 cooperates with'the scale 27 in the usual way, andit will be seen that a very close reading can be obtained. The single scale 21 may be employed for giving either a verticalreading or.

recess in its hypotenuse portion and having bores at the ends of the hypotenuse portion, the recess and the bores defining lugs, a micrometer screw journaled in the lugsand extended longitudinally of the recess, the hypotenuse portion having an edge groove which opens downwardly into the recess, a rider slidable along the outer edge of the hypotenuse portion and extended downwardly through the groove and into U the recess, the micrometer screw being threaded into the rider,

' within the recess, the hypotenuse portion having a single longitudinal scale wherewith the rider 1 lug screws being located in the bores. V

WALTER L. JOHNSON. 

